Type-writing machine.



Nues-13,8601

PATENTED JULY ZI, 19087 B. E. MGSHEEHY.

TYPE WRITING MACHINE.

APPLICATION FILED JUNE 12,1905.

2 SHEETSHBHEET I.

. 41 13a 5 17 10 y 35 J I 13 MUM/5556' @f4/MKM No. 893,860. PATENTED JULY 21, 1908. B. E. MGSHEEHY.

TYPE WRITING MACHINE:

APPLICATION FILED JUNE 12.1905.

2 SHEETS-SHEET z.

UNITED sriirnsrarnnr oFF-ron.

BARTHOLOMEv E. MeSI-IEEHY, Q1" JERSEY CITY, NEv JERSEY, ASSIGNUR Tt) STEPHEN T.

WILLIAMS t STAFF, LlMlTFJ), OF Bos'rox. MAssaonusn'ius, tomaraHusum von- PRISED or s'r-EPHEN '1. MLLiAMs AND mirrriotouaw u. l

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented July 21, 1908.

Application led June 12, 1905. Serial No. 264,824.

To all whom 'it may concern:

Be it known that I, BAnTnoLoMEw E. MCSHEEHY, a citizen of the United States, residing in Jersey City, in the county of IIudson and State of New Jersey, have invented certain new and useful Improvements in Type-'Vriting Machines, of which the following is a specification.

This invention relates to typewriting machines, particularly those of the frontstrilre variety, and its object is to facilitate the introduction of sheets between the revoluble platen and the usual devices which guide and feed the paper around beneath the platen, particularlyT where it is together several sheets of different shapes and sizes in a special relation to one another with intervening carbon sheets, or where it is desired to insert sheets that are pasted together, or so assembled, so that they will not conveniently enter vthe bite of the usual pressure rollers. To accomplish this pur-` pose I malte provision for lifting the revoluble platen away from the paper guiding` and feeding devices that are usually mounted beneath the platen. Thus ample space is left for the introduction of paper at either the front or back of the platen between the same and said guiding and feeding devices. In order to insure the regularity or evenness of the written lines, I contrive to locl; the platen down in normal position, while permitting it to rotate for line-spacing. h/Ioreover in order to permit the operator to have both handsfree for the insertion of the paper when the platen is elevated, I provide means for mechanically detaining the platen in its elevated position.

Other objects and advantages will hereinafter appear.

In the accompanying drawings, Figure 1 is a sectional view of the platen frame at the right hand end thereof, indicating the platen by a dotted circle and showing the platen aXle in section. Fig. 2 is a view similar to Fig, 1, showing the platen as elevated so as to permit introduction of sheets, and also showing in dotted lines the usual devices for casting off the pressure rollers. Fig. 3 is an elevation of the left-hand end of the platen frame and paper carriage, the parts shown in full lines in normal position, and the platen being shown in dotted lines in elevated posidesired to assemble necting bar 13 form a tion. Fig. 4 is a plan of the platen frame with appurtenances.

The invention is shown applied to the well known Underwood typewriting machine, in which the type bars 1 strike rearwardly against the front side of a revoluble platen 2 the latter having an axle 3, extending through the ends 4, 5 of a platen frame and carrying fmger-wheels 3a; said frame also including a rear paper shelf 6, which extends down beneath the platen and curves up in front thereof at 7 to serve as a guide for directing the paper forwardly and upwardly around the platen. To feed the paper either forwardly or backwardly, provided to bear against the under sides of the platen.

For lifting the platen I provide a pair of three-armed members, one at each end'of the platen, and each comprising arms 10, 11 and 1 2. The arms 10 are rigidly united by a bar 13, which extends along the platen at a considerable distance from the front thereof. The pair of arms 10 taken with the rigid conbail, which is hinged upon pivot screws 14 threaded in ears 15 provided upon the ends of the platen frame. By means of the bar 13, the bail may be swung down and up about said hinge.

At their rear ends the arms 11, which form continuations of arms'lO, are provided with slots 16 to engage the platen axle 3 and lift and front the same to the position seen at Fig. 2,'so

that when it is desired to lift the platen., it is only necessary to press down the bar 13. The. platen ends are provided with slots 17 through which the ends of the platen arde 3 extend, the slots being of a form to permit up and down movements of the platen axle about the hinge 14. The platen is normally locked down by means of a pair of latches 18 pivoted at 18" upon the ends of the. platen frame, and catching directly over said axle, as at Fig. 1. This latch or lock is released during the downward movement of said bar 13 the arms 12 of the three-armed levers be ing for this purpose connected by a pair of links 19 to arms 20, formed upon said latch. lVhen the levers turn upon hinge 14, the links 19 drive back the arms 20, and slip the latch back off from the axle. During this time there is no movement of the axle. This lost-motion of the three-armed members is rolls 8, 9 are also.

provided for by said slots 16 in the arms 1.1. During the first art ot the movement of said arms, while the inks 1t) are forcingy the latch 18 off trom the axle 3, the arms 11 move independently ot the plateiraxle; and then the latter is engaged b v thelower ends ot the slots 16, and thereby elevated to the position seen at Fig. 2, the platen being thus carried clear of the paper guiding and feeding devices 6, 7, 8 and 9. lt will be seen that the sheets, whether pasted together or otherwise assembled, may be readily` inserted at either the back or front of the platen, and then the latter may be returned to position by simply raising the bar 13, whereby the paper is caught between the platen and the pressure rollers 8, 9, and may thereafter be fed either forwardly or backwardly in the usual manner.

In order to enable the operator to employ beth hands in inserting sheets, I provide tor mechanically holding the platen elcvated'in` the Fig. 2 position. For this purpose the backward movement of the latch-arm 2O is opposed by a spring 21. lt willalso be seen that the members 1%) term toggles, which,

. during the upward movement ol' the plate-n,

pass the straight-line position, and thereafter the springs 21, acting upon the arms 20, operate through the links 1t) to elevate the arm 12. These springs 21 are sufficiently strong to support the weight of the platen, so that the latter is prevented from dropping. Stops 22 fixed upon the latch members 18 engage the ends of the arm 11 and prevent the platen from being elevated beyond the position seen at Fig. 2. By lifting the bar 13, the parts are returned to normal position, and the spring 21 forces the latch over the axle 3.

After the assembled sheets are inserted around the platen, the pressure rollers S, 9 may be thrown oil by means of the usual release key 23, link 24, and roek shaft 25. These release parts being well known need no further description. The release key remains down in its operative position in the usual manner. The sheets may then be adliusted accurately by means of the usual scale in front ol' the platen, or otherwise, and then the release key 23 returned to normal position. rThus the platen may be elevated to permit the introduction ot paper, and then returned. to normal oosition, and subsequently the pressure rollls may be thrown oil' to permit the adjustment ot the paper.

At Fig. 3 is shown the usual line-spacing mechanism 3 the platen axle being shown in section in normal position, and in dotted lines in elevated position.

The cam lever 26, which is used to disengage the line space detent 27, may be provided with a closed slot 2S to inclose and act upon the pin 29 of said roll 27. The cam being in this form, there is no opportunity for accidental disengagemen tot said pin from -relation to the wide sheets.

the control ot the cam by reason ot the up and down movements oli the platen and linespacing wheel whieh is rigidly eonneeted to the platen, i v

`Mounted upon the bar l are two pairs ot pressure rolls 30, 31, thetormer between the latter. lCaeh roller is adjustable independently of the other along said bar by means oi' brackets 32, and the latter are mounted to turn upon the bar 13, which is cylindrical in form, so that when it is desired either to ini sert the paper downwardly in l'ront otl the platen or to adjust the paper atter introduction, said rolls may be cast oil' from the platen. These rolls bear normally against the upper front side of the platen, a little above the printing line.

The outer rolls 31 may remain in operative position to hold wide sheets ot paper, while the inner rolls 30 permit adjustment ot narrow sheets of paper to the proper positions in Normally the rolls are held against the platen by springs 3?, which bear upon the ends ol little rolls $34, and press the latter into a groove 5&5 extending longitudinally ot the bar 12%.

The line spaee wheel 2'1"L is operated by a spring pawl 39, which as usual stands away from the wheel to permit backward rotation ot the latter. It will be seen that there is sutlieient clearance between the pawl and the wheel to enable the latter to swing up wilhout engaging the pawl. As usual in the Umlerwood machine, said pawl is operated by a lever 36, having a short arm 3T to engage a slide 3S, the latter carrying the pawl 39 and provided with a returning spring lo. 'l`he platen and line space wheel nuty thus be thrown up ilulependently ol'` the meehauism that rotates the line space wheel. 'l`he roll 27 may remain in engagement with the line space wheel during the upward and downward movements ot the latter' without objeetion.

Many variations may be resorted to within the scope of the invention, `particularly in the manner ot' hanging a bail or other trame upon the. platen l'rame (or traveling trame) l'or litt ing the platen; and portions ol my im provements may be used without others.

llaving thus described my invention, l claim:

l. In a typewriting machine, the combination with a platen and a platen axle, ot a trame supporting said platen, a pair ol" locks engaging the axle at the ends ot the platen, a pair ol thriai-armed members hinged at the ends ot the platen trame, a bar rigidly con` l neeting one pair ot the arms of said three armed members, means upon another pair ol said arms for engaging the platen axle to litt the platen, and. means connected to the remaining pair ot said arms For releasing said locks.

2. In a typewriting machine, the eombination with a platen and a platen axle, of a ivoted, and being connected by links to the frame supporting said platen, a pair of locks ast-mentioned pair of arms in such a manengaging the axle at the ends of the platen, a ner that when the platen is elevated the pair of three-armed inem-bers hinged to the spring-pressed locking members serve to hold 15 5 ends of the platen frame, a bar rigidly eonthe p ten in its elevated position; means be nesting one pair of the arms of said tlireeing provided for limiting the upward movearmed members, means upon another pair of nient .of the platen.

said arms for engaging the platen axle to=lift BARTHOLOMEW E. MUSHEEHY. the platen, and means connected to the re- Witnesses: 10 maining pair of said arms for releasing said A. Gr. WETTACH,

locks; said locks being spring-pressed and P. C. SAVAGE. 

